QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

11 km SSW of Bradley, Oklahoma

· 15 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 28 kmStephens County 35 kmMcClain County 39 kmGarvin County 43 kmCleveland County 62 kmComanche County 66 kmCaddo County 70 kmMurray County 72 kmCarter County 74 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.8 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Grady County, 28 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1528 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 550 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 34.7905, -97.7698. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 28 km (17 mi) SSE of here earthquakes near Grady County
Stephens County, OK 35 km (22 mi) NNE of here earthquakes near Stephens County
McClain County, OK 39 km (24 mi) SW of here earthquakes near McClain County
Garvin County, OK 43 km (27 mi) WNW of here earthquakes near Garvin County
Cleveland County, OK 62 km (38 mi) SW of here earthquakes near Cleveland County
Comanche County, OK 66 km (41 mi) ENE of here earthquakes near Comanche County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

54 earthquakes have been recorded within 50 km since this one.

  1. 2.2 4 km SSW of Katie, Oklahoma
  2. 1.7 3 km SSW of Katie, Oklahoma
  3. 1.6 4 km SSW of Katie, Oklahoma
  4. 1.5 9 km SSE of Dibble, Oklahoma
  5. 1.6 9 km WSW of Blanchard, Oklahoma
  6. 1.8 1 km SE of Erin Springs, Oklahoma
  7. 1.7 1 km ESE of Ratliff City, Oklahoma
  8. 1.9 0 km NNW of Ratliff City, Oklahoma
  9. 2.2 0 km S of Ratliff City, Oklahoma
  10. 2.0 0 km ESE of Ratliff City, Oklahoma
  11. 1.6 10 km SSW of Bradley, Oklahoma
  12. 1.7 3 km WSW of Washington, Oklahoma
  13. 1.7 5 km SW of Washington, Oklahoma
  14. 2.0 3 km WSW of Washington, Oklahoma
  15. 2.0 4 km WSW of Washington, Oklahoma

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.